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  • Genetic analysis and fine mapping of a premature leaf senescence mutant in rice (Orzya sativa L.).

    Author(s) : Zhang TaoSun YuYingZheng JianMinCheng ZhiJunJiang KaiFengYang LiCao YingJiangYou ShuMeiWan JianMinZheng JiaKui

    Author Affiliation : Rice and Sorghum Research Institute, Sichuan Academy of Agricultural Sciences/Key Laboratory of Southwest Rice Biology and Genetic Breeding, Ministry of Agriculture, Deyang 618000, China.

    Author Email : zhen6102@126.comyszht@163.com105683744@qq.comjianminxingzheng@yeah.net

    Journal article : Acta Agronomica Sinica 2014 Vol.40 No.12 pp.2070-2080 ref.32

    Abstract : Leaf senescencesenescenceSubject Category: Natural Processes
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    induces degradation of chlorophyll and other macromolecules, reducing leaf photosynthetic capacity. This process is accompanied by the accumulation of reactive oxygen species (ROS), the decreasing of cell antioxidant enzyme (SOD, CAT, and APX) activity, and the increasing of aging related gene (SAG) expression, leading in early maturity and yield reduction. Therefore, studies on the genetic mechanism and gene function of premature senescence in ricericeSubject Category: Commodities and Products
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    , has the important effect and significance in genetic improvement of rice. PLS2 from space radiation mutation breeding project showed leaf senility, at booting stage. Compared with the wild type, in PLS2 the photosynthetic capacity decreased, the plant heightplant heightSubject Category: Properties
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    , internode and panicle length shortened, tiller and effective tiller number reduced, number of grains per ear and seed setting rate were significantly lower, 1000-grain weight decreased, main panicle was stunted and grain-filling was not full. CAT activity decreased significantly in leavesleavesSubject Category: Anatomical and Morphological Structures
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    , H2O2 accumulated, and the number of dead cell increased, chloroplast structures in leaves were worse, with more starches grains and osmiophilic granules. DarkdarkSubject Category: Properties
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    treatment accelerated mutant leaf senescence, chloroplast ultrastructure was spheroidized. Using implicit localization population derived from PLS2/Shuhui 527 and PLS2/02428 the pls2 was located between markers RM14704 (8 674 283 bp) and SL-I-5 (8 758 394 bp) on chromosome 3, with physical distance of 84.11 kb, including 14 genes in the interval. Sequencing result showed that C was replaced with T in the position of 41 base pair of the ninth extron of LOC_Os03g15840 leading to an exchange of Arg (R) is replaced by Cys(C). LOC_Os03g15840 coding a glycosyl transferase (GTs) may be the candidate gene of pls2. These results provide a foundation for the further gene cloning and functional analysis of pls2.

    ISSN : 0496-3490

    URL : http://www.chinacrops.org

    Record Number : 20153028575

    Publisher : Science Press

    Location of publication : Beijing

    Country of publication : China

    Language of text : Chinese

    Language of summary : English

    Indexing terms for this abstract:

    Organism descriptor(s) : Oryza sativaoryza sativaSubject Category: Organism Names
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    Descriptor(s) : catalasecatalaseSubject Category: Chemicals and Chemical Groups
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    , cell ultrastructurecell ultrastructureSubject Category: Miscellaneous
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    , chloroplastschloroplastsSubject Category: Anatomical and Morphological Structures
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    , crop yieldcrop yieldSubject Category: Properties
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    , darkdarkSubject Category: Properties
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    , DNA sequencingdna sequencingSubject Category: Techniques, Methodologies and Equipment
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    , enzyme activityenzyme activitySubject Category: Properties
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    , enzymesenzymesSubject Category: Chemicals and Chemical Groups
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    , genetic analysisgenetic analysisSubject Category: Techniques, Methodologies and Equipment
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    , genetic mappinggenetic mappingSubject Category: Techniques, Methodologies and Equipment
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    , hydrogen peroxidehydrogen peroxideSubject Category: Chemicals and Chemical Groups
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    , internodesinternodesSubject Category: Anatomical and Morphological Structures
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    , leavesleavesSubject Category: Anatomical and Morphological Structures
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    , mutantsmutantsSubject Category: Miscellaneous
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    , mutationsmutationsSubject Category: Miscellaneous
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    , nucleotide sequencesnucleotide sequencesSubject Category: Chemicals and Chemical Groups
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    , paniclespaniclesSubject Category: Anatomical and Morphological Structures
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    , photosynthesisphotosynthesisSubject Category: Natural Processes
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    , plant heightplant heightSubject Category: Properties
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    , ricericeSubject Category: Commodities and Products
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    , seed setseed setSubject Category: Natural Processes
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    , seed weightseed weightSubject Category: Properties
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    , senescencesenescenceSubject Category: Natural Processes
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    , starch granulesstarch granulesSubject Category: Anatomical and Morphological Structures
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    , tillerstillersSubject Category: Anatomical and Morphological Structures
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    , yield componentsyield componentsSubject Category: Miscellaneous
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    Identifier(s) : carbon assimilation, carbon dioxide fixation, darkness, DNA sequences, nucleotide sequence analysis, nucleotide sequencing, paddy

    Broader term(s) : OryzaoryzaSubject Category: Organism Names
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    , PoaceaepoaceaeSubject Category: Organism Names
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    , PoalespoalesSubject Category: Organism Names
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    , commelinidscommelinidsSubject Category: Organism Names
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    , monocotyledonsmonocotyledonsSubject Category: Organism Names
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    , angiospermsangiospermsSubject Category: Organism Names
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    , SpermatophytaspermatophytaSubject Category: Organism Names
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    , plantsplantsSubject Category: Organism Names
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    , eukaryoteseukaryotesSubject Category: Organism Names
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